Horizontal Well Geosteering Modeling Method Combined with Well and Seismic

Abstract

The invention provides a geosteering modeling method for horizontal wells that combines well seismicity, which includes: step 1, collecting adjacent well data and small-scale three-dimensional seismic data in the work area; step 2, performing stratigraphic comparison based on the collected adjacent well data in the work area. And divide into small layers; Step 3, use ordinary Kriging interpolation method to establish a three-dimensional digital geological body in the work area based on the layered data of adjacent wells; Step 4, cut a two-dimensional profile from the three-dimensional geological body along the well trajectory; Step 5 , use the time-depth relationship in the work area to process the three-dimensional seismic data and cut a two-dimensional section along the well trajectory, and display it overlayed with the stratigraphic model cut out of the three-dimensional geological body; Step 6, according to the shape of the seismic section event, the stratum The model is adjusted so that the stratigraphic model shape matches the seismic event shape. This horizontal well geosteering modeling method combined with well seismicity improves the accuracy of structural description and reservoir prediction, and provides strong technical support for horizontal well geosteering.

Description

technical field [0001] The invention relates to the technical field of horizontal well geosteering, in particular to a horizontal well geosteering modeling method combined with well and seismic. Background technique [0002] With the development of oil drilling technology, oil and gas reservoirs that could not be commercially developed in the past due to reasons such as thin oil layers and poor recoverable properties can now be exploited by drilling horizontal wells. Especially in recent years, the development of coalbed methane and shale gas has higher and higher requirements for drilling technology. As a new drilling technology, horizontal well drilling technology has increased production and production efficiency, and effectively developed oil and gas reservoirs that were unavailable in the past. , are increasingly used in oil and gas drilling. In the process of horizontal well drilling in the oil and gas exploration and production department, how to guide the drill bit ...

AI Technical Summary

Problems solved by technology

Current technology does not meet the needs of geological understanding while drilling

Moreover, a standardized geosteering analysis model has not yet been formed.

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